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Amazon's Hidden Chatbot Recommends Nazi Books and Lies About Amazon Working Conditions
(www.404media.co)
This is a most excellent place for technology news and articles.
They're also infamously terrible, being half-correct and prone to detecting non-native English speakers as being AI. To the point where at least one institutition decided to not use a detector.
You'd likely be equally as accurate guessing at random. Not to mention that at the end of the day, they're just recognising quirks in the generated text. It is not difficult to mask those quirks either by having the prompt put out text in a different style, or for an update to change the generated text, breaking the detection as well.
There is no definite, sure-fire way to determine that text is AI-generated or not. For all you might know, as an AI language model, I could have cooked this comment up using a billion probability nodes loaded up into a typewriter, as it does not go against OpenAI's policies on generating text.